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biology - meiosis

TermDefinition
nondisjunction failure of homologus chromosomes to separate during meiosis
monosomy condition of having 1 less chromosome
trisomy condition of having 1more chromosome
karyotype picture of an individual's chromosomes used to detect a genetic disorder
amniocentesis technique used to producea Karyotype by analyzing the mother's fluid
Turner's syndrome XO (sign: wide neck) female
Kleinfelter's syndrome XXY (sign: weak bones, bigger breasts) male
Down syndrome Trisomy 21 (sign: small head, short neck) male/ female
Independent assortment homologus chromosomes separate randomly resulting in genetic variation in gametes
crossing over homologus cromosomes exchange segments of DNA resulting in geetic variation in gametes (during prophase, tetrads forms)
Diploid cell A cell that contains the normal number of chromosomes, cells contain do contain homologous chromosomes
Haploid cell A cell that contains half the number of chromosomes, cell do not contain homologous chromosomes
Homologous chromosomes Pair chromosomes from male and female that carry genes for the same traits
Sister chromatid Identical chromosomes attached by a centromere
Meiosis A type of cell division that produces gametes
Meiosis 1 Homologous chromosomes separate to form 2 hapolid cell
Meiosis 2 Sister chromatids separate to form 4 hapolid cell
Spermatogenesis Meiosis in males
Oogenesis Meiosis in females
Polar bodies 3 nonfunctional egg cells formed by oogenesis
Created by: snaveran
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